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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narratives (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Summary Of Significant Accounting Policies [Line Items] |  |  |
Research and development expense | $ 107.0 | $ 105.0 | $ 95.0
Realized Gain (Loss), Foreign Currency Transaction, after Tax | $ 20.0 | $ 14.0 | $ (40.0)
Land Improvements | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 10 years |  |
Land Improvements | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 20 years |  |
Building and improvements | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 5 years |  |
Building and improvements | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 30 years |  |
Machinery and equipment | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 2 years |  |
Machinery and equipment | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 10 years |  |
Furniture and Fixtures | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 3 years |  |
Furniture and Fixtures | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property, plant and equipment, useful life | 10 years |  |
Technology Intangible Assets | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 20 years |  |
Technology Intangible Assets | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 22 years |  |
Order backlog | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 1 year |  |
Order backlog | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 3 years |  |
Customer Relationships | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 20 years |  |
Other Intangible Assets | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Finite lived intangible asset useful life | 20 years |  |

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- Definition Amount, after tax, of realized gain (loss) from foreign currency transaction. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 205 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478009/946-205-45-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 55 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479168/946-830-55-11 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 830 -Name Accounting Standards Codification -Section 45 -Paragraph 38 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477346/946-830-45-38 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section 45 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479105/946-220-45-6 + Details
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- Definition Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 48 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482785/280-10-55-48 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 730 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482916/730-10-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 912 -SubTopic 730 -Name Accounting Standards Codification -Section 25 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479532/912-730-25-1 + Details
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